C# Type.GetTypeInfo方法代码示例

 public static AttributeMap[] Create(TypeModel model, Type type, bool inherit)
 {
     #if FEAT_IKVM
     Type attribType = model.MapType(typeof(System.Attribute));
     System.Collections.Generic.IList<CustomAttributeData> all = type.__GetCustomAttributes(attribType, inherit);
     AttributeMap[] result = new AttributeMap[all.Count];
     int index = 0;
     foreach (CustomAttributeData attrib in all)
     {
         result[index++] = new AttributeDataMap(attrib);
     }
     return result;
     #else
     #if WINRT
     Attribute[] all = System.Linq.Enumerable.ToArray(type.GetTypeInfo().GetCustomAttributes(inherit));
     #else
     var all = type.GetCustomAttributes(inherit);
     #endif
     var result = new AttributeMap[all.Length];
     for (var i = 0; i < all.Length; i++)
     {
         result[i] = new ReflectionAttributeMap((Attribute) all[i]);
     }
     return result;
     #endif
 }

        static Type ResolveIReadOnlyCollection(Type declaredType, Type t)
        {
#if WINRT
            foreach (Type intImplBasic in declaredType.GetTypeInfo().ImplementedInterfaces)
            {
                TypeInfo intImpl = intImplBasic.GetTypeInfo();
                if (intImpl.IsGenericType && intImpl.Name.StartsWith("IReadOnlyCollection`"))
                {
                    if(t != null)
                    {
                        Type[] typeArgs = intImpl.GenericTypeArguments;
                        if (typeArgs.Length != 1 && typeArgs[0] != t) continue;
                    }
                    return intImplBasic;
                }
            }
#else
            foreach (Type intImpl in declaredType.GetInterfaces())
            {
                if (intImpl.IsGenericType && intImpl.Name.StartsWith("IReadOnlyCollection`"))
                {
                    if(t != null)
                    {
                        Type[] typeArgs = intImpl.GetGenericArguments();
                        if (typeArgs.Length != 1 && typeArgs[0] != t) continue;
                    }
                    return intImpl;
                }
            }
#endif
            return null;
        }

        public static ParseableSerializer TryCreate(Type type, TypeModel model)
        {
            if (type == null) throw new ArgumentNullException("type");
#if WINRT || PORTABLE || COREFX
            MethodInfo method = null;
            
#if WINRT || COREFX
            foreach (MethodInfo tmp in type.GetTypeInfo().GetDeclaredMethods("Parse"))
#else
            foreach (MethodInfo tmp in type.GetMethods(BindingFlags.Public | BindingFlags.Static | BindingFlags.DeclaredOnly))
#endif
            {
                ParameterInfo[] p;
                if (tmp.Name == "Parse" && tmp.IsPublic && tmp.IsStatic && tmp.DeclaringType == type && (p = tmp.GetParameters()) != null && p.Length == 1 && p[0].ParameterType == typeof(string))
                {
                    method = tmp;
                    break;
                }
            }
#else
            MethodInfo method = type.GetMethod("Parse",
                BindingFlags.Public | BindingFlags.Static | BindingFlags.DeclaredOnly,
                null, new Type[] { model.MapType(typeof(string)) }, null);
#endif
            if (method != null && method.ReturnType == type)
            {
                if (Helpers.IsValueType(type))
                {
                    MethodInfo toString = GetCustomToString(type);
                    if (toString == null || toString.ReturnType != model.MapType(typeof(string))) return null; // need custom ToString, fools
                }
                return new ParseableSerializer(method);
            }
            return null;
        }

        private static MethodInfo GetCustomToString(Type type)
        {
#if WINRT
            foreach (MethodInfo method in type.GetTypeInfo().GetDeclaredMethods("ToString"))
            {
                if (method.IsPublic && !method.IsStatic && method.GetParameters().Length == 0) return method;
            }
            return null;
#elif PORTABLE || COREFX
            MethodInfo method = Helpers.GetInstanceMethod(type, "ToString", Helpers.EmptyTypes);
            if (method == null || !method.IsPublic || method.IsStatic || method.DeclaringType != type) return null;
            return method;
#else

            return type.GetMethod("ToString", BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly,
                        null, Helpers.EmptyTypes, null);
#endif
        }

        internal static bool IdentifyImmutable(TypeModel model, Type declaredType, out MethodInfo builderFactory, out MethodInfo add, out MethodInfo addRange, out MethodInfo finish)
        {
            builderFactory = add = addRange = finish = null;
            if (model == null || declaredType == null) return false;
#if WINRT
            TypeInfo declaredTypeInfo = declaredType.GetTypeInfo();
#else
            Type declaredTypeInfo = declaredType;
#endif

            // try to detect immutable collections; firstly, they are all generic, and all implement IReadOnlyCollection<T> for some T
            if(!declaredTypeInfo.IsGenericType) return false;

#if WINRT
            Type[] typeArgs = declaredTypeInfo.GenericTypeArguments, effectiveType;
#else
            Type[] typeArgs = declaredTypeInfo.GetGenericArguments(), effectiveType;
#endif
            switch (typeArgs.Length)
            {
                case 1:
                    effectiveType = typeArgs;
                    break; // fine
                case 2:
                    Type kvp = model.MapType(typeof(System.Collections.Generic.KeyValuePair<,>));
                    if (kvp == null) return false;
                    kvp = kvp.MakeGenericType(typeArgs);
                    effectiveType = new Type[] { kvp };
                    break;
                default:
                    return false; // no clue!
            }

            if (ResolveIReadOnlyCollection(declaredType, null) == null) return false; // no IReadOnlyCollection<T> found

            // and we want to use the builder API, so for generic Foo<T> or IFoo<T> we want to use Foo.CreateBuilder<T>
            string name = declaredType.Name;
            int i = name.IndexOf('`');
            if (i <= 0) return false;
            name = declaredTypeInfo.IsInterface ? name.Substring(1, i - 1) : name.Substring(0, i);

            Type outerType = model.GetType(declaredType.Namespace + "." + name, declaredTypeInfo.Assembly);
            // I hate special-cases...
            if (outerType == null && name == "ImmutableSet")
            {
                outerType = model.GetType(declaredType.Namespace + ".ImmutableHashSet", declaredTypeInfo.Assembly);
            }
            if (outerType == null) return false;

#if WINRT
            foreach (MethodInfo method in outerType.GetTypeInfo().DeclaredMethods)
#else
            foreach (MethodInfo method in outerType.GetMethods())
#endif
            {
                if (!method.IsStatic || method.Name != "CreateBuilder" || !method.IsGenericMethodDefinition || method.GetParameters().Length != 0
                    || method.GetGenericArguments().Length != typeArgs.Length) continue;

                builderFactory = method.MakeGenericMethod(typeArgs);
                break;
            }
            Type voidType = model.MapType(typeof(void));
            if (builderFactory == null || builderFactory.ReturnType == null || builderFactory.ReturnType == voidType) return false;


            add = Helpers.GetInstanceMethod(builderFactory.ReturnType, "Add", effectiveType);
            if (add == null) return false;

            finish = Helpers.GetInstanceMethod(builderFactory.ReturnType, "ToImmutable", Helpers.EmptyTypes);
            if (finish == null || finish.ReturnType == null || finish.ReturnType == voidType) return false;

            if (!(finish.ReturnType == declaredType || Helpers.IsAssignableFrom(declaredType, finish.ReturnType))) return false;

            addRange = Helpers.GetInstanceMethod(builderFactory.ReturnType, "AddRange", new Type[] { declaredType });
            if (addRange == null)
            {
                Type enumerable = model.MapType(typeof(System.Collections.Generic.IEnumerable<>), false);
                if (enumerable != null)
                {
                    addRange = Helpers.GetInstanceMethod(builderFactory.ReturnType, "AddRange", new Type[] { enumerable.MakeGenericType(effectiveType) });
                }
            }

            return true;
        }

        internal static bool IsSubclassOf(Type type, Type baseClass)
        {
#if WINRT
            return type.GetTypeInfo().IsSubclassOf(baseClass);
#else
            return type.IsSubclassOf(baseClass);
#endif
        }

 internal static MethodInfo GetInstanceMethod(Type declaringType, string name, Type[] types)
 {
     return GetInstanceMethod(declaringType.GetTypeInfo(), name, types);
 }

        internal static bool IsAssignableFrom(Type target, Type type)
        {
#if WINRT
            return target.GetTypeInfo().IsAssignableFrom(type.GetTypeInfo());
#else
            return target.IsAssignableFrom(type);
#endif
        }

        internal static bool IsEnum(Type type)
        {
#if WINRT
            return type.GetTypeInfo().IsEnum;
#else
            return type.IsEnum;
#endif
        }

        internal static bool IsValueType(Type type)
        {
#if WINRT
            return type.GetTypeInfo().IsValueType;
#else
            return type.IsValueType;
#endif
        }

        public void EmitCtor(Type type, params Type[] parameterTypes)
        {
            Helpers.DebugAssert(type != null);
            Helpers.DebugAssert(parameterTypes != null);
            if (Helpers.IsValueType(type) && parameterTypes.Length == 0)
            {
                il.Emit(OpCodes.Initobj, type);
#if DEBUG_COMPILE
                Helpers.DebugWriteLine(OpCodes.Initobj + ": " + type);
#endif
            }
            else
            {
                ConstructorInfo ctor =  Helpers.GetConstructor(type
#if COREFX
                .GetTypeInfo()
#endif
                    , parameterTypes, true);
                if (ctor == null) throw new InvalidOperationException("No suitable constructor found for " + type.FullName);
                EmitCtor(ctor);
            }
        }

        private CompilerContext(Type associatedType, bool isWriter, bool isStatic, TypeModel model, Type inputType)
        {
            if (model == null) throw new ArgumentNullException("model");
#if FX11
            metadataVersion = ILVersion.Net1;
#else
            metadataVersion = ILVersion.Net2;
#endif
            this.isStatic = isStatic;
            this.isWriter = isWriter;
            this.model = model;
            nonPublic = true;
            Type[] paramTypes;
            Type returnType;
            if (isWriter)
            {
                returnType = typeof(void);
                paramTypes = new Type[] { typeof(object), typeof(ProtoWriter) };
            }
            else
            {
                returnType = typeof(object);
                paramTypes = new Type[] { typeof(object), typeof(ProtoReader) };
            }
            int uniqueIdentifier;
#if PLAT_NO_INTERLOCKED
            uniqueIdentifier = ++next;
#else
            uniqueIdentifier = Interlocked.Increment(ref next);
#endif
            method = new DynamicMethod("proto_" + uniqueIdentifier.ToString(), returnType, paramTypes, associatedType
#if COREFX
                .GetTypeInfo()
#endif
                .IsInterface ? typeof(object) : associatedType, true);
            this.il = method.GetILGenerator();
            if (inputType != null) this.inputValue = new Local(null, inputType);
        }